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Equipment for the assembly of the main mold material there is bad, do not wear-resistant, dust pollution is serious and so on. Mechanical plant should be strengthened with metal materials research department collaboration, select the applicable cathode ring mold materials and heat treatment method.

Raw materials and spare parts

To promote mercury-free alkaline manganese battery, the process, it is necessary to down-to-earth manner, some base building. Mercury-free alkaline manganese batteries need to be dedicated to further improve the quality of EMD, in particular heavy metal impurities are no longer content to be reduced, but also improve the battery at high voltage potential and discharge capacity of the whole point of martial arts.

For alkaline manganese batteries graphite powder, a lot are processed by the squamous form of graphite, and graphite in squamous Fe, Cu and other elements with a high level. Without effective control measures and testing means, such graphite production of mercury-free batteries, can lead to major quality accidents.

China has not completely mercury-free zinc clearance from the selection of high-quality zinc starting material, but also must look at appropriate processing methods. Al with Ca in place of the In-Bi 1 Ca zinc alloy is more conducive to reduce the mercury-free alkaline manganese battery storage period of chronic short-circuit. Analysis selection depth of discharge gas on the low zinc dependent solution are mercury-free battery storage and resistance to leakage of important performance measures.

Alkaline manganese batteries divide need to further improve performance, improve density and uniformity, increase block. Korea provided technology divide winding spiral winding method, to meet the requirements for mercury-free, to recommend appropriate winding adjust the angle so that the effective increase in low-rise. Reduce the membrane thickness of paper to increase the winding layers, which is the international alkaline manganese battery industry is a tendency.

CMC, such as traditional zinc ointment Thickening the use of mercury-free zinc powder stability variation, can not meet the requirements of mercury-free battery. To enhance the mercury-free alkaline manganese batteries of anti-vibration performance and storage performance, the proposed selection of PA and PA 1 Na high viscosity, good stability of zinc paste thickener, and select the appropriate ratio, the performance of battery will be more the desired results. Alkaline manganese battery of standardized parts alkaline manganese batteries are mercury-free implementation of the basic conditions. Alkaline manganese battery set up some spare parts base, strengthen the quality control of parts of the alkaline manganese battery improve the quality of implementation of mercury-free alkaline manganese batteries is very important.

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According to nine ministries and commissions such as the State Economic and Trade “about restrictions on mercury content in batteries provides that” the notification requirement, implementation of low alkaline manganese battery, mercury-free period has been entered of, therefore, to solve related technical problems, rule out the possibility of mercury-free process obstacles to become a top priority.

Mercury-free alkaline manganese battery of technical issues involved in the following areas:

Mechanical equipment and tooling mold
China’s industrialization late alkaline manganese batteries, mercury-free technology by the study because of equipment, spare parts and materials to such constraints is still in its infancy, especially for low, mercury-free alkaline manganese battery production of domestic machinery and equipment not yet sophisticated, the vast majority of plant is still used for intermittent production of equipment, spare parts processing, tooling mold has not yet considered mercury-free requirements.
     Anode preparation equipment is currently in use is still the largest pharmaceutical machinery, including the mixed powder, tablet or relief rolled article, into tablets, screening and preparation, such as zinc cream. Equipment exist the following main aspects:

(1) mold tooling, machinery and equipment did not attach importance to material corrosion resistance, stability and wear resistance, particularly in domestic equipment. Mixing barrels, roll, zinc cream containers, etc., etc. Although the use of high-grade stainless steel materials, it has still not reached the requirements for mercury-free, ordinary stainless steel corrosion, oxidation and wear resistance are inferior. Mercury-free alkaline manganese battery anode of Fe, Mo and other elements is 7 ~ 10 1 10 1 6 control, materials corrosion, electrochemical reaction and mechanical factors such as the anode is likely to result in more than the allowable values of impurity elements. Korea’s Rocket anode preparation equipment required to adapt to mercury-free and consider a more comprehensive, it is worth drawing on its inner wall mixing machine the wear-resistant non-metallic coating material, contact zinc cream containers full of machinery and the use of engineering plastics, completely avoid metal impurities mixed people.

(2) genuine low rate of serious cross-contamination. By the mixed powder to screen out qualified silt, general equipment into tablets in a 65% rate is only about 2 / 3 for the unqualified goods, required repeated at several machine cycle, this increase in cross-cathode powder pollution. While Europe and the United States of powder processing systems, its first rate into tablets of 65% ~ 80%, greatly reduces equipment wear and particles of cross-contamination.

(3) of the equipment Chuan (to) the use of moving parts of copper and other harmful metals. Mercury-free alkaline manganese batteries are particularly sensitive to copper cathode, copper cathode and other impurities mixed powder people are caused by chronic mercury-free battery short circuit potential.

(4) alkaline medium conditions, drying process easily lead carbonate powder cathode, and also prone to cross-contamination. High concentrations of lead carbonate are alkaline batteries climb one of the factors for mercury-free alkaline manganese batteries require higher concentrations of carbonate.

(5) anode current collector assembly also mainly depend on domestic add mechanical intermittent manual processing. On aspects of product quality by man-made factors, on the other hand, such processing can not meet the requirements for mercury-free. This is also the necessary machinery and equipment, one of the problems as soon as possible. Set nail and negative flow at the end of the welding method is also worthy of study, are currently widely used by DC energy storage explosion welding, this welding of copper is not easily lead to contamination collector assembly, are caused by mercury-free alkaline manganese batteries short-circuit an important risk of chronic . Import anode current collector assembly equipment required hundreds of thousands or even hundreds of million yuan, the battery should be attached great importance to the mechanical plant equipment, research and development, improve labor productivity is also an important aspect.

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